SYMFONY4 : "Notice: Undefined variable: parentClass" - php

Question

I've got this error message when i try to go to a page which calls an entity. (For example the contact page, or articles page)
"Notice: Undefined variable: parentClass" which refer me to this file
vendor\doctrine\persistence\lib\Doctrine\Common\Persistence\AbstractManagerRegistry.php line 176
public function getManagerForClass($class)
{
// Check for namespace alias
if (strpos($class, ':') !== false) {
[$namespaceAlias, $simpleClassName] = explode(':', $class, 2);
$class = $this->getAliasNamespace($namespaceAlias) . '\\' . $simpleClassName;
}
$proxyClass = new ReflectionClass($class);
if ($proxyClass->implementsInterface($this->proxyInterfaceName)) {
$parentClass = $proxyClass->getParentClass();
if (! $parentClass) {
return null;
}
}
$class = $parentClass->getName();
foreach ($this->managers as $id) {
$manager = $this->getService($id);
if (! $manager->getMetadataFactory()->isTransient($class)) {
return $manager;
}
}
}
I really dont know what to do.
If someone got an idea or already had this error :)
Thank you !

Answer 1

your correctly indented code looks like this:
$proxyClass = new ReflectionClass($class);
if ($proxyClass->implementsInterface($this->proxyInterfaceName)) {
$parentClass = $proxyClass->getParentClass();
if (! $parentClass) {
return null;
}
}
$class = $parentClass->getName();
now, in the case that $proxyClass->implementsInterface(...) is FALSE there is no $parentClass defined, hence the error message.
since the code appears to be in doctrine, maybe it's a bug. Maybe it was fixed and you use an old version for some reason. maybe update?
in the current version the line is inside the if-block

Answer 2

you're absolutely right, i don't know why $class = $parentClass->getName(); was out the 'if', the problem was effectively this ! Thank you !